Revolving adjustable kiln.



w. LEssmG. Paume "Y '6, 90|- BEVDLVING ADJUSTABLE KILN (No Modell) (Application led Apr. 28, 1900.) I

.2 Sheets-Sheet l.

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Patentd luly I6, |90l.

w. Lvessms. BEVOLVING lADJUSTABLE KILN.

(Application. led Apr. 23, 1900.)`

2 Sheets-Sheet 2.

(N0 Model.)

VILHELM LESSING, OF GESECKE, GERMANY.

REVOLVING ADJUSTABLE KILN.

SPECXFIGATIN forming part of Letters Patent No. 678,411, dated July 16, 1901. Application led April 23,1900. Serial No. 14,085. (No model.)

To all whom, t may concern:

Be it known that I, WILHELM Lnssrxc, a subject of the Emperor of Germany, residing at Gesecke, Westphalia, Germany, have invented a new and Improved Revolving Adjustable Kiln,of which the following is a speciiicaticn.

In the construction heretofore known of revolving kilns for the continued burning of earths and chemicals said kilns or ovens were provided with an inner jacket of lireproof material. When the material to be burned passed through such kilns in lumps, each lump had a frictional effect upon the lining of the kilns, so that the said lining was Ain a short time completely worn away and had to be replaced in time in order to prevent the burning of the metal jacket of the kiln. lf, on the other hand, in order to prevent the wearing away of the lining the material was introduced into the kiln in the form of powder instead of in lumps, the additional disadvantage resulted, owing to the known increased tendency of the pulverized material to cake and form an adhesive mass under the influence of high temperature, that the caked material adhered to the sides of the kiln and that'the continual accumulation thereof and the revolving of the kiln resulted in the latter becoming gradually stopped up, so that ultimately no more material could pass through.

The object of the present invention is a revolving kiln for the -continued burning of earths and chemicals in which the above-men-V itself is also intensely heated in advance and carries oxygen of a very high temperature to the interior of the kiln, by' which circumstance the burning accelerated.

The kiln forming the object of the present invention is suspended in such a manner that process is considerably it can oscillate on a fixed frame and can be given any desired degree of inclination by means of adjusting-screws, so that the speed with which the material passes through the kiln can be regulated by altering the position of the latter.

In the annexed drawings a form of construction of the kiln is represented.

Figure l is a longitudinal section of the entire kiln. Fig. 2 is a cross-section of the same, showing the method of suspension. Fig. 3 is a plan view of the kiln; and Fig. 4, a section ot the lining of the kiln, on an enlarged scale, at the place where the compressed air is introduced into the channels in t-he lining.

In the form represented in section in Fig. 4 the interior surface of the lining of the kiln is provided with grooves a. Therebyribs or ridges are formed which continually lift the material and let it fall through the flame, which process they continually repeat until the material leaves the kiln. At one part of the kiln (see Fig. 4) cross-borings c enter the air-'channels b, which latter are longitudinally placed and extend part way throughout the length of said kiln. Through these cross-borings c compressed airis introduced. This can be done or accomplished by various means. The only requisite condition is that the escape of compressed air should be prevented as much as possible by carefully preventing leakage and that the revolution of the kiln should in no manner further leakage. In the form of construction represented the prevention of leakage is effected by means of an elastic grooved metal split ring d, which ts closely against the outer circumference of the kiln and is prevented from revolving with the latter by some suitable arrangement, such as the abutment e. This ring d must, of course, completely cover the openings of the cross-borings c. ends in the ring d.

The kiln itself moves in ball-bearings, the stationary boxes of which form parts of a frame h, revolving on the pintles t'. The two outer axle-boxes rest, by means of the screws lo, upon cradles j and can be elevated or lowered by adjusting the nuts m. jIt is thereby possible to give the kiln a greater or less degree of inclination and to thus accelerate or re- The compressed-air pipe f IOO tard the passage of the material being burned through the kiln. The kiln can be caused to revolve by various means. In the present instance it is driven by the cog-wheel z.

With this novel kiln the process is, in a few words,as follows: The air pressed through the ring rl and the borings c into the channels b has no means of escape but through the pores of the lining of the kiln and is therefore forced through these into the interior of the kiln and prevents the lining, by cooling it, from being burned very rapidly. By forcing bac-k into the kiln the heat which penetrates into the lining the air prevents the accumulation of slags on the inner surface of the lining, and thereby the waste of heat, and is itself so intensely heated that it carries oxygen of a very high temperature into the interior of the kiln, by which circumstance the burning process is either considerably accelerated or economy in the draft arrangements is effected.

Having now described my invention, what I claim as new,and desire to protect by Letters Patent, is-

l. A new and improved revolving adjustable kiln having a porous fireproof lining and means in connection with said lining for forcing back into the said kiln its internal heat together with ribs for materially reducing the friction developed between said lining and the burning mass, substantially as in the manner and for the purpose set forth and described.

2. A new revolving adjustable kiln having a porousiireproof lining with means for forcing fresh air therethrough and provided on its inner surface with a plurality of grooves and curved ribs substantially as described.

3. A new revolving adjustable kiln having a porous Iireproof lining provided with airchannels and cross borings in connection therewith, receiving air from without which under pressure is forced through said lining into said kiln, and ribs formed on the inner surface of said lining in which said channels and cross-borings are formed, substantially as described.

4. A new revolving adjustable kiln having a cylindrical body portion, means for revolving the same, a porous fireproof lining therein provided with air-channels and cross-borings in connection therewith, an air-tight elastic grooved ring surrounding said body and covering the outer ends of said borings7 substantially as described. f

5. A new kiln having a cylindrical body, means for adjusting and revolving the same and a porous tireproof lining within said body provided with air-channels in connection with cross-borings, a'grooved split elastic metallic ring surrounding said kiln-body and covering the outer ends of said borings, and ribs formed on the inner surface of said lining, substantially as described.

Berlin this 24th day of March, 1900.

ULI-HELM LESSlNG. In presence of HENRY HASPER, WOLDEMAR HAUPT. 

